Support

If your repeater battery backups, it is interesting to know if the supply voltage 230V is present on your repeater.

We will use an opto input to which we connect a (former ) Phone power transformer. This type of transformer -based power and control in addition to being available in the drawers , with the advantage of also do not radiate as may be the case for small block of switching power supply. Its charge voltage is indicated on its label 3.7V . When empty, the voltmeter shows 9 V.

Connection

The resistor R33 installation of 1 kW allows a consumer 6mA on the input of the optocoupler .

Alert code

We chose to alert the user to the loss 220V power supply by changing the tone of the micro released ( roger beep repeater ) .

This code must be placed in the rgr_sound . When the power source is loss, the input GPIO24 is low (0)' . At that time , the usual beep is replaced by an ambulance tone ( in France 3 tones : 420 Hz, 516 Hz, 420 Hz).